Top K Frequent Words

arrayhash tablestring

Problem Statement

Given an array of strings words and an integer k , return the k most frequent strings .

Return the answer sorted by the frequency from highest to lowest. Sort the words with the same frequency by their lexicographical order .

Examples

Example 1

Input: words = ["i","love","leetcode","i","love","coding"], k = 2
Output: ["i","love"]
"i" and "love" are the two most frequent words.
Note that "i" comes before "love" due to a lower alphabetical order.

Example 2

Input: words = ["the","day","is","sunny","the","the","the","sunny","is","is"], k = 4
Output: ["the","is","sunny","day"]
"the", "is", "sunny" and "day" are the four most frequent words, with the number of occurrence being 4, 3, 2 and 1 respectively.

Constraints

1 <= words.length <= 500

1 <= words[i].length <= 10

words[i] consists of lowercase English letters.

k is in the range [1, The number of unique words[i]]

🤔

Medium

Difficulty

Topic Info

ModuleDSA

CategoryArray

Sub-topicHash Table